EP0187435B1 - Lawnmower - Google Patents

Lawnmower Download PDF

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Publication number
EP0187435B1
EP0187435B1 EP19850305015 EP85305015A EP0187435B1 EP 0187435 B1 EP0187435 B1 EP 0187435B1 EP 19850305015 EP19850305015 EP 19850305015 EP 85305015 A EP85305015 A EP 85305015A EP 0187435 B1 EP0187435 B1 EP 0187435B1
Authority
EP
European Patent Office
Prior art keywords
housing
cutting blade
weedcutter
shaft
wheels
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19850305015
Other languages
German (de)
French (fr)
Other versions
EP0187435A1 (en
Inventor
Masato C/O Oppama Kogyo K.K. Nogawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kioritz Corp
Original Assignee
Kioritz Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP268860/84 priority Critical
Priority to JP59268860A priority patent/JPH0229286B2/ja
Application filed by Kioritz Corp filed Critical Kioritz Corp
Publication of EP0187435A1 publication Critical patent/EP0187435A1/en
Application granted granted Critical
Publication of EP0187435B1 publication Critical patent/EP0187435B1/en
Expired legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/67Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator
    • A01D34/68Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator with motor driven cutters or wheels
    • A01D34/6806Driving mechanisms
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/82Other details
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D2101/00Lawn-mowers

Description

  • This invention relates to lawnmowers and in particular to a device for converting a powered weedcutter to a lawnmower, and to a lawnmower comprising such a conversion.
  • Viewed from one aspect the invention provides, for use with a portable powered weedcutter having a long operating shaft with a motor at one end and a rotary cutting blade at the other end, said cutting blade being driven by the motor by means of a driving shaft extending through the operating shaft and being arranged to rotate in a horizontal plane in use, a device for converting the weedcutter to a lawnmower, such device comprising: a housing mountable to the said other end of the weedcutter to enclose the upper part of the said cutting blade, a grass discharge port in said housing, and a pair of front wheels mounted on said housing so as to be vertically adjustable relative thereto for setting the depth of cut. Thus in this aspect the invention provides means for converting a powered weedcutter to a lawnmower.
  • Viewed from another aspect the invention provides a lawnmower comprising a portable powered weedcutter having a long operating shaft with a motor at one end and a rotary cutting blade at the other end, said cutting blade being driven by the motor by means of a driving shaft extending through the operating shaft and being arranged to rotate in a horizontal plane in use, characterised in that the lawnmower further includes a detachable device comprising a housing detachably mounted to the said other end of the weedcutter to enclose the upper part of the said cutting blade, a grass discharge port in said housing, and a pair of front wheels mounted on said housing so as to be vertically adjustable relative thereto for setting the depth of cut. Thus in this aspect the invention provides a lawnmower which is convertible to a powered weedcutter, by removing the said detachable device.
  • Preferably the said housing has a central aperture adapted to fit around, and be secured to, a casing containing bearings of the final drive shaft of the rotary cutter.
  • Preferably each of the said wheels is mounted at one end of a respective bell-crank lever pivotally mounted on a common axis on the said housing, the other ends of the said levers being connected to the opposite ends of a common transverse shaft which is positionally adjustable laterally of its axis to rotate the said bell-crank levers and thereby vertically adjust the wheels. The apparatus may then include spring-operated detent means on the housing for holding the said transverse shaft in any desired one of a plurality of positions of adjustment.
  • An embodiment of the invention will now be described by way of example and with reference to the accompanying drawings, in which:
    • Fig. 1 is a side elevation view of an apparatus according to the invention;
    • Fig. 2 is a plan view of the cutting assembly of the apparatus;
    • Fig. 3 is a vertical longitudinal axial sectional view of such cutting assembly;
    • Fig. 4 is a sectional view of part of a mechanism for setting the depth of cut;
    • Fig. 5 is a vertical sectional view of a gear and bearing assembly of the apparatus;
    • Fig. 6 is an external perspective view of the cutting assembly; and
    • Fig. 7 is a diagrammatic view to illustrate the positional relationship between the wheels and the cutting blade.
  • In Fig. 1, showing a general view, a weed cutter a comprises an operating shaft 1 of a suitable length, a motor 2 provided at the top end of the shaft and a cutting blade 3 rotatable horizontally at the bottom end thereof.
  • A driving shaft 4 extends through the operating shaft 1 from the motor 2, and a bearing and gear casing 5 is provided at the bottom end. As shown in Fig. 5, a final drive shaft 6 for the cutting blade 3 is mounted within the casing 5. A bevel gear 7 provided at the upper end of the shaft 6 and a bevel gear 8 provided at the lower end of the driving shaft 4 mesh with each other so that the cutting blade 3 may be rotated by the motor 2. The thus constructed portable weedcutter is suspended and supported from a shoulder strap (not illustrated) secured to the operating shaft 1, and the operating shaft is swung to right and left by the operator to cut weeds.
  • Referring again to Fig. 5, reference numeral 9 indicates a lower bearing for the final drive shaft 6 of the cutting blade 3. A flange 10 mounts a housing 11 of a device b for converting the weedcutter to a lawnmower. The purpose of the housing 11 is to prevent grass cuttings or extraneous matter such as abandoned vinyl sheets from being entangled with the shaft 6. A cover (not illustrated) to prevent cut weeds from flying towards the operator may be provided on the lower part of the outside of the gear casing 5, and this cover may be replaced by the housing 11.
  • In the present apparatus, the flange 10 is utilized to fit the conversion device b.
  • As shown particularly in Fig. 6, the conversion device b comprises a main body provided by the housing 11 which encloses the upper part of the cutting blade 3 and is formed with a central hole 12 fitting around the casing 5 in the vicinity of the bearing 9. As shown in Figs. 1, 2, 3 and 5, the housing 11 is secured to the casing 5 by threaded bolts 13 screwed into the flange 10.
  • The device b further comprises a pair of verti- caly adjustable front wheels 14, and a grass discharge port 15 at the rear thereof. Reference numeral 16 indicates a guide duct connected to the discharge port 15, and 17 is a grass collecting bag.
  • Referring now particularly to the wheels 14, these are made vertically adjustable relative to the housing 11 so that the depth of cut may be adjusted. Thus a bell-crank lever 19 is pivotally mounted on a supporting shaft 18 on each side of the front part of the housing 11 and the wheels 14 are mounted on axles 25 at the forward ends of the respective levers 19. The levers 19 are interconnected at their rear ends by a transverse shaft 20. When the shaft 20 is moved forward or rearward i.e. laterally relative to its axis, the wheels 14 will be moved vertically and can thereby be set in predetermined positions to adjust the depth of cut.
  • To secure the shaft 20 in a desired position, a locking pin 22 biassed by a spring 21 is mounted in a suitable position on the shaft 20, and a locking bar 24 having a suitable number of holes 23 to receive the locking pin 22 is provided on the housing 11 so that, by inserting the locking pin 22 in one of the holes 23, the shaft 20 may be secured in a desired position to set the height of the wheels 14.
  • Preferably the cutting edge of the cutting blade 3 is so positioned that, as shown in Fig. 7, it is substantially vertically aligned with the axles 25 of the wheels 14, so that irrespective of the vertical movement of the operating shaft 1, the consequent movement of the cutting edge of the blade will be so small that fluctuation of the depth of cut will be minimal.
  • It will thus be seen that, at least in its preferred forms, the invention provides simple, inexpensive and efficient means for converting a powered weedcutter to a small lightweight, easily operable lawnmower, provided with simple but effective means for adjusting the depth of cut, and which can also of course be used as a weedcutter when desired, by removing the conversion device. The two-wheeled arrangement also makes the lawnmower particularly easy to manoeuver.

Claims (5)

1. For use with a portable powered weedcutter (a) having a long operating shaft (1) with a motor (2) at one end and a rotary cutting blade (3) at the other end, said cutting blade being driven by the motor by means of a driving shaft (4) extending through the operating shaft and being arranged to rotate in a horizontal plane in use, a device (b) for converting the weedcutter to a lawnmower, such device comprising: a housing (11) mountable to the said other end of the weedcutter to enclose the upper part of the said cutting blade, a grass discharge port (15) in said housing, and a pair of front wheels (14) mounted on said housing so as to be vertically adjustable relative thereto for setting the depth of cut.
2. A lawnmower comprising a portable powered weedcutter (a) having a long operating shaft (1) with a motor (2) at one end and a rotary cutting blade (3) at the other end, said cutting blade being driven by the motor by means of a driving shaft (4) extending through the operating shaft and being arranged to rotate in a horizontal plane in use, characterised in that the lawnmower further includes a detachable device (b) comprising a housing (11) detachably mounted to the- said other end of the weedcutter to enclose the upper part of the said cutting blade, a grass discharge port (15) in said housing, and a pair of front wheels (14) mounted on said housing so as to be vertically adjustable relative thereto for setting the depth of cut.
3. Apparatus as claimed in claim 1 or 2, further characterised in that said housing (11) has a central aperture (12) adapted to fit around, and be secured to, a casing (5) containing bearings (9) of the final drive shaft (6) of the rotary cutter (3).
4. Apparatus as claimed in any of claims 1 to 3, further characterised in that each of the said wheels (14) is mounted at one end of a respective bell-crank lever (19) pivotally mounted on a common axis (18) on the said housing, the other ends of the said levers being connected to the opposite ends of a common transverse shaft (20) which is positionally adjustable laterally of its axis to rotate the said bell-crank levers and thereby vertically adjust the wheels.
5. Apparatus as claimed in claim 4, further including spring-operated detent means (22) on the housing (11) for holding the said transverse shaft (20) in any desired one of a plurality of positions of adjustment.
EP19850305015 1984-12-20 1985-07-12 Lawnmower Expired EP0187435B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP268860/84 1984-12-20
JP59268860A JPH0229286B2 (en) 1984-12-20 1984-12-20

Publications (2)

Publication Number Publication Date
EP0187435A1 EP0187435A1 (en) 1986-07-16
EP0187435B1 true EP0187435B1 (en) 1989-03-15

Family

ID=17464268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850305015 Expired EP0187435B1 (en) 1984-12-20 1985-07-12 Lawnmower

Country Status (5)

Country Link
US (1) US4633658A (en)
EP (1) EP0187435B1 (en)
JP (1) JPH0229286B2 (en)
CA (1) CA1251649A (en)
DE (1) DE3568685D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004107844A1 (en) * 2003-06-10 2004-12-16 Torque Holdings Limited A line trimmer lawn mowing attachment

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3735961C2 (en) * 1986-10-25 1991-06-06 Gutbrod-Werke Gmbh, 6601 Buebingen, De
US4756147A (en) * 1986-11-03 1988-07-12 Savell Kenneth J Weed-trimmer-to-lawn-mower conversion carriage
GB9008569D0 (en) * 1990-04-17 1990-06-13 Electrolux Northern Lawn mowers
US5230208A (en) * 1990-06-01 1993-07-27 Black & Decker Inc. Lawn mower height-adjust systems
JP2537483Y2 (en) * 1990-06-14 1997-06-04 株式会社共立 Brush cutter
US6003292A (en) * 1997-07-08 1999-12-21 Country Home Products, Inc. Brush mower with deflection plate
US6370854B1 (en) 1998-07-06 2002-04-16 Mark R. Moore Guard and dolly for line trimming apparatus
US6178729B1 (en) * 1999-04-09 2001-01-30 Laszlo Vastag Lawn mower with a deck formed with a trap door
US7111403B2 (en) 1999-09-21 2006-09-26 Moore Mark R Head for line trimming apparatus
US6401344B1 (en) 1999-09-21 2002-06-11 Mark R. Moore Head for line trimming apparatus
IT251709Y1 (en) * 2000-03-14 2004-01-20 Valex Internat Sa Apparatus portable electric lawnmower with interposition element for the self-alignment and the engine group support
GB2363961B (en) * 2001-05-23 2002-07-03 Robert Lawrence Fowler Grass-cutting machines
US7216471B1 (en) * 2002-08-02 2007-05-15 Rizwan Syed Hassan Attachable carriage for converting an edge trimmer to a lawnmower
US7536792B2 (en) * 2007-01-03 2009-05-26 Moore Mark R Head for a rotary line trimmer apparatus
CN101632335B (en) * 2008-07-23 2011-04-27 苏州宝时得电动工具有限公司 Handheld operating apparatus
JP5620160B2 (en) * 2010-06-17 2014-11-05 株式会社マキタ Hand-held lawn mower
US9043957B2 (en) * 2011-10-25 2015-06-02 Honda Motor Co., Ltd. Movable door apparatuses and methods for a combination grass discharge and mulching lawnmower
CN103548481A (en) * 2013-11-01 2014-02-05 苏州安必瑟斯机电技术有限公司 Mowing machine
AU2016267570B2 (en) 2015-05-27 2019-01-03 Mtd Products Inc. Self-cleaning mower blade assembly
EP3302021B1 (en) 2015-06-05 2019-10-09 MTD products Inc Walk-behind mower with steering wheel control
USD797530S1 (en) 2015-06-05 2017-09-19 Mtd Products Inc Blade
USD795299S1 (en) 2016-02-16 2017-08-22 Mtd Products Inc Blade
US10433480B2 (en) 2016-04-20 2019-10-08 Mtd Products Inc Low-energy blade system having a quick-attach mechanism
CN109640618A (en) 2016-06-24 2019-04-16 Mtd产品公司 High efficiency cutting system
USD795300S1 (en) 2016-08-23 2017-08-22 Mtd Products Inc Blade

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US2648187A (en) * 1950-04-11 1953-08-11 George J Ries Rotary grass and weed trimmer
US2938323A (en) * 1956-02-07 1960-05-31 Brown & Root Combined mower, edger, and trimmer
US2915318A (en) * 1957-02-20 1959-12-01 Sears Roebuck & Co Adjustable wheel mounting for lawnmower and the like
US2894761A (en) * 1957-03-25 1959-07-14 Dille & Mcguire Mfg Co Quick adjustment means for rotary lawn mowers
US2848859A (en) * 1957-04-03 1958-08-26 Huffman Mfg Company Lawn mower with adjustable wheel mounting assembly
US3000647A (en) * 1958-10-15 1961-09-19 Fox Howard Corp Means for adjusting lawn mower wheels
US3568421A (en) * 1968-03-12 1971-03-09 Mcdonough Power Equipment Inc Lawn mower
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JPS5097930U (en) * 1974-01-17 1975-08-15
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DE2743043C2 (en) * 1977-09-24 1987-05-14 Fa. Andreas Stihl, 7050 Waiblingen, De
US4280319A (en) * 1978-06-26 1981-07-28 Roper Corporation Deck construction for rotary mower
US4232505A (en) * 1978-08-09 1980-11-11 The Toro Company Dual element filament mower
US4226021A (en) * 1978-10-19 1980-10-07 Hoffco, Inc. Shaft assembly for lawn trimmer
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US4450673A (en) * 1980-08-11 1984-05-29 Hutchison Marion E Mulching mower
US4389836A (en) * 1981-07-08 1983-06-28 Lowry Joseph M Carriage for a grass trimming device
JPS58135225U (en) * 1982-03-08 1983-09-12
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US4531350A (en) * 1984-09-10 1985-07-30 Huthmacher Edward A Universal wheeled assembly for grass trimmers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004107844A1 (en) * 2003-06-10 2004-12-16 Torque Holdings Limited A line trimmer lawn mowing attachment

Also Published As

Publication number Publication date
JPS61146110A (en) 1986-07-03
CA1251649A1 (en)
JPH0229286B2 (en) 1990-06-28
DE3568685D1 (en) 1989-04-20
CA1251649A (en) 1989-03-28
US4633658A (en) 1987-01-06
EP0187435A1 (en) 1986-07-16

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